bacteria methicillin-resistant staphylococcus aureus mrsa

staphylococcus pathology microscopic diarrhea microbes spherical microorganisms pus sepsis purulent cocci staphylococci sick mrsa bacteria bacteriemia superbug close surgical infection epidemic closeup macro cells bacterium human 3d toxin background illustration health medical medicine virus microscope micro shapes science pyogenic biology illness fever sickness microbiology disease life scientific aureus microscopy magnification